Although it sounds normal to see the process of starting the computer, it can then present the desktop in front of you after completing many processes. At the moment when the computer's power button is turned on, it is a small but very effective machine-level software in BIOS, checking that the system's Vital part is working properly. This is called post or power on self-test. It checks basic inputs and output devices like monitors and keyboards. Then you see some text in the monitor.
Those texts let you know each other whether your other basic devices are running correctly. For example, how much RAM is installed, whether it is a processor or a special third party device. Problems with this level are usually on the motherboard, the beep beats the beep or the monitors are showing the problem. All these issues are hardware-related. Here are the problems faced by computers today.
